With the boom of gravel riding and racing, tire choices abound. Zipp’s modest tubeless tire line now includes the Tangente Course G40 and is a welcome option for anyone wanting to go fast on the gravels. Available as a single, 700x40c size, it hits the sweet spot of width, speed, traction and comfort.

Zipp Tangente Course G40 Features:

  • Optimized, high performance gravel tire
  • Aggressive cornering side knobs for excellent control
  • Fast rolling center section
  • Aramid bead-to-bead puncture protection strip
  • Recommended 30-65 psi
  • Tubeless Ready, tube compatible
  • 127 TPI casing
  • Tan sidewall
  • Hookless compatible
  • Weight: 485 grams (actual)
  • MSRP: $65
Zipp G40 Gravel Tire Treads

Those center knobs roll right along.

Zipp’s zippy gravel tires

Many may overlook Zipp’s tire line because their wheels and cockpit bits deservedly take most of the spotlight. Truthfully, I’ve had good luck with their tires over the years and the Tangente Speed RT28’s remain some of my favorite 28c tubeless road tires. When Zipp launched the gravel-friendly Tangente Course G40, I was sort of surprised since they still don’t have a RT30/32 model. As it turns out, the G40 is a solid entry into the fast-rolling gravel tire market.

Loaded up on the still-relevant 21mm internal Zipp 30 Course Wheelset, the G40’s measure out to 41mm and sit at 39mm tall (that’s an important number for fitment on the 3T Exploro RaceMax). At that volume, the G40’s look substantial and end up riding like a dream (but rear tolerances were tight on the RaceMax). First, let’s talk about installation.

Zipp Tangente Course G40 Tires on the 3T Exploro RaceMax

Exploring the local singltrack was always a blast on the G40’s.

The G40’s were pre-installed from SRAM HQ on the 30 Course Wheelset and ridden during several hundred miles of testing, through that, they have performed flawlessly with no burps, weeping or issues. Stan’s sealant was used and is as reliable as usual. I’ve also personally installed them on the previous-generation Zipp 303 Firecrest Wheelset and it was a breeze. I got the tires on the rims without tools (or swearing) and inflated them on the first try with the Blackburn Chamber Tubeless Floor Pump. Even without sealant, the tires seat up and maintain air super well. I’ll continue testing them on other wheelsets in the future and add more install info here.

For my 170 lb. rider weight, I typically inflated the G40’s to 35/38 psi. front and rear. Most of my rides with these tires were about 60/40 gravel to road ratio. On the smoothest, fastest gravel, the G40’s simply fly. With low-profile treads and ¬†fast-rolling center knobs, you’ll enjoy the speed and efficiency these tires can maintain. On the road, they roll very smoothly and don’t hold me back much on long tarmac climbs. No, they aren’t as fast as a set of ENVE SES 29c Tires, but they really aren’t going to slow you down much. That supple, 127 tpi. casing definitely adds to the overall feel of the tires as they easily conform to the terrain.

As the gravel gets more demanding, the Tangente Course G40’s respond well. The well-spaced side knobs grab predictably as needed through corners. I enjoyed ripping up the local singletrack just as much as the gravel roads around my home. You really can push the G40’s hard and their large volume is very forgiving.

The only time I lost traction was on loose, standing climbs. You really have to maintain the proper weight balance to keep the rear tire from slipping out, but that happens with the best tires too. I haven’t had any significant air loss, nor have the sidewalls shown any sign of damage — even though I’ve ridden them pretty aggressively.

The Good

  • Very fast rolling
  • Side knobs deliver excellent cornering in the dirt and gravel
  • A great tire for dry conditions
  • Tool-free and swear-free mounting
  • Hold air pressure extremely well
  • Have held up to a good amount of abuse
  • I’m a big tan wall fan

The Bad

  • The height of the tires caused tight clearances on my test bike
  • You’ll need just the right balance to maintain traction on loose, standing climbs

The Bottom Line: Zipp Tangente Course G40

Zipp is focused on speed and it shows with their fast-rolling G40 Gravel Tire. I can usually keep up with my Strava segment times set on narrower, road tires with ease. The tool-free install is such a welcome trait for any tubeless tire these days, but especially gravel tires. Leave it to Zipp to develop a gravel tire that’s fast, reliable and easy to install.

Buy Now: Available from SRAM

About Author

A native of the Pacific Northwest, Jason quickly developed a love for the outdoors and a thing for mountains. That infatuation continues as he founded this site in 1999 -- sharing his love of road biking, mountain biking, trail running and skiing. That passion is channeled into every article or gear review he writes. Utah's Wasatch Mountains are his playground.

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